40204123 has 2 divisors, whose sum is σ = 40204124. Its totient is φ = 40204122.

The previous prime is 40204103. The next prime is 40204139. The reversal of 40204123 is 32140204.

It is an a-pointer prime, because the next prime (40204139) can be obtained adding 40204123 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40204123 - 2⁵ = 40204091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40204097 and 40204106.

It is not a weakly prime, because it can be changed into another prime (40204103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20102061 + 20102062.

It is an arithmetic number, because the mean of its divisors is an integer number (20102062).

Almost surely, 2^40204123 is an apocalyptic number.

40204123 is a deficient number, since it is larger than the sum of its proper divisors (1).

40204123 is an equidigital number, since it uses as much as digits as its factorization.

40204123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 40204123 is about 6340.6721252561. The cubic root of 40204123 is about 342.5759449399.

Adding to 40204123 its reverse (32140204), we get a palindrome (72344327).

The spelling of 40204123 in words is "forty million, two hundred four thousand, one hundred twenty-three".